<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Example scripts</title><link rel="stylesheet" type="text/css" href="manual.css"><meta name="generator" content="DocBook XSL Stylesheets V1.76.0"><link rel="home" href="index.html" title="JpGraph Manual"><link rel="up" href="ch25.html" title="Chapter 25. PDF417 (2D-Barcode)"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Example scripts</th></tr><tr><td width="20%" align="left"> </td><th width="60%" align="center">Chapter 25. PDF417 (2D-Barcode)</th><td width="20%" align="right"> </td></tr></table><hr></div><div class="sect1" title="Example scripts"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2603171"></a>Example scripts</h2></div></div></div>
        
        <p>The following section shows some example scripts that can serve as starting points for
            further development. </p>
        <div class="sect2" title="Showing human readable text"><div class="titlepage"><div><div><h3 class="title"><a name="id2603211"></a>Showing human readable text</h3></div></div></div>
            
            <p>
                </p><div class="example"><a name="example.pdf417_ex3"></a><p class="title"><b>Example 25.5. Showing human readable text (<code class="filename">pdf417_ex3.php</code>) </b></p><div class="example-contents">  <div class="hl-main"><table class="hl-table" width="100%"><tr><td class="hl-gutter" align="right" valign="top"><pre>1
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</pre></td><td class="hl-main" valign="top"><pre><span class="hl-inlinetags">&lt;?php</span><span class="hl-code"> </span><span class="hl-comment">//</span><span class="hl-comment"> content=&quot;text/plain; charset=utf-8&quot;</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-reserved">require_once</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">jpgraph/pdf417/jpgraph_pdf417.php</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
 
</span><span class="hl-var">$data</span><span class="hl-code"> = </span><span class="hl-quotes">'</span><span class="hl-string">PDF-417</span><span class="hl-quotes">'</span><span class="hl-code">;
 
</span><span class="hl-comment">//</span><span class="hl-comment"> Setup some symbolic names for barcode specification</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-var">$columns</span><span class="hl-code"> = </span><span class="hl-number">8</span><span class="hl-code">;   </span><span class="hl-comment">//</span><span class="hl-comment"> Use 8 data (payload) columns</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$errlevel</span><span class="hl-code"> = </span><span class="hl-number">4</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Use error level 4</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$modwidth</span><span class="hl-code"> = </span><span class="hl-number">2</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Setup module width (in pixels)</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$height</span><span class="hl-code"> = </span><span class="hl-number">2</span><span class="hl-code">;    </span><span class="hl-comment">//</span><span class="hl-comment"> Height factor (=2)</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$showtext</span><span class="hl-code"> = </span><span class="hl-reserved">false</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Show human readable string</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-comment">//</span><span class="hl-comment"> Create a new encoder and backend to generate PNG images</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-reserved">try</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-var">$encoder</span><span class="hl-code"> = </span><span class="hl-reserved">new</span><span class="hl-code"> </span><span class="hl-identifier">PDF417Barcode</span><span class="hl-brackets">(</span><span class="hl-var">$columns</span><span class="hl-code">,</span><span class="hl-var">$errlevel</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code"> = </span><span class="hl-identifier">PDF417BackendFactory</span><span class="hl-code">::</span><span class="hl-identifier">Create</span><span class="hl-brackets">(</span><span class="hl-identifier">BACKEND_IMAGE</span><span class="hl-code">,</span><span class="hl-var">$encoder</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetModuleWidth</span><span class="hl-brackets">(</span><span class="hl-var">$modwidth</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetHeight</span><span class="hl-brackets">(</span><span class="hl-var">$height</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">NoText</span><span class="hl-brackets">(</span><span class="hl-code">!</span><span class="hl-var">$showtext</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">Stroke</span><span class="hl-brackets">(</span><span class="hl-var">$data</span><span class="hl-brackets">)</span><span class="hl-code">;
</span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-reserved">catch</span><span class="hl-brackets">(</span><span class="hl-identifier">JpGraphException</span><span class="hl-code"> </span><span class="hl-var">$e</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-reserved">echo</span><span class="hl-code"> </span><span class="hl-quotes">'</span><span class="hl-string">PDF417 Error: </span><span class="hl-quotes">'</span><span class="hl-code">.</span><span class="hl-var">$e</span><span class="hl-code">-&gt;</span><span class="hl-identifier">GetMessage</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code">;
</span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-inlinetags">?&gt;</span></pre></td></tr></table></div></div></div><p><br class="example-break">  </p><div class="figure"><a name="fig.pdf417_ex3"></a><p class="title"><b>Figure 25.12. Showing human readable text <code class="uri"><a class="uri" href="example_src/pdf417_ex3.html" target="_top">(<code class="filename">pdf417_ex3.php</code>)</a></code> </b></p><div class="figure-contents">  <span class="inlinemediaobject"><img src="images/pdf417_ex3.png" alt="Showing human readable text (pdf417_ex3.php)"></span> </div></div><p><br class="figure-break">
            </p>
        </div>
        <div class="sect2" title="Altering colors"><div class="titlepage"><div><div><h3 class="title"><a name="id2603267"></a>Altering colors</h3></div></div></div>
            
            <p>
                </p><div class="example"><a name="example.pdf417_ex4"></a><p class="title"><b>Example 25.6. Changing colors (<code class="filename">pdf417_ex4.php</code>) </b></p><div class="example-contents">  <div class="hl-main"><table class="hl-table" width="100%"><tr><td class="hl-gutter" align="right" valign="top"><pre>1
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</pre></td><td class="hl-main" valign="top"><pre><span class="hl-inlinetags">&lt;?php</span><span class="hl-code"> </span><span class="hl-comment">//</span><span class="hl-comment"> content=&quot;text/plain; charset=utf-8&quot;</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-reserved">require_once</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">jpgraph/pdf417/jpgraph_pdf417.php</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
 
</span><span class="hl-var">$data</span><span class="hl-code"> = </span><span class="hl-quotes">'</span><span class="hl-string">PDF-417</span><span class="hl-quotes">'</span><span class="hl-code">;
 
</span><span class="hl-comment">//</span><span class="hl-comment"> Setup some symbolic names for barcode specification</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-var">$columns</span><span class="hl-code"> = </span><span class="hl-number">8</span><span class="hl-code">;   </span><span class="hl-comment">//</span><span class="hl-comment"> Use 8 data (payload) columns</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$errlevel</span><span class="hl-code"> = </span><span class="hl-number">4</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Use error level 4</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$modwidth</span><span class="hl-code"> = </span><span class="hl-number">2</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Setup module width (in pixels)</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$height</span><span class="hl-code"> = </span><span class="hl-number">2</span><span class="hl-code">;    </span><span class="hl-comment">//</span><span class="hl-comment"> Height factor (=2)</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$showtext</span><span class="hl-code"> = </span><span class="hl-reserved">true</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Show human readable string</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-reserved">try</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-comment">//</span><span class="hl-comment"> Create a new encoder and backend to generate PNG images</span><span class="hl-comment"></span><span class="hl-code">
    </span><span class="hl-var">$encoder</span><span class="hl-code"> = </span><span class="hl-reserved">new</span><span class="hl-code"> </span><span class="hl-identifier">PDF417Barcode</span><span class="hl-brackets">(</span><span class="hl-var">$columns</span><span class="hl-code">,</span><span class="hl-var">$errlevel</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code"> = </span><span class="hl-identifier">PDF417BackendFactory</span><span class="hl-code">::</span><span class="hl-identifier">Create</span><span class="hl-brackets">(</span><span class="hl-identifier">BACKEND_IMAGE</span><span class="hl-code">,</span><span class="hl-var">$encoder</span><span class="hl-brackets">)</span><span class="hl-code">;
 
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetModuleWidth</span><span class="hl-brackets">(</span><span class="hl-var">$modwidth</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetHeight</span><span class="hl-brackets">(</span><span class="hl-var">$height</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">NoText</span><span class="hl-brackets">(</span><span class="hl-code">!</span><span class="hl-var">$showtext</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetColor</span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">black</span><span class="hl-quotes">'</span><span class="hl-code">,</span><span class="hl-quotes">'</span><span class="hl-string">yellow</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">Stroke</span><span class="hl-brackets">(</span><span class="hl-var">$data</span><span class="hl-brackets">)</span><span class="hl-code">;
</span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-reserved">catch</span><span class="hl-brackets">(</span><span class="hl-identifier">JpGraphException</span><span class="hl-code"> </span><span class="hl-var">$e</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-reserved">echo</span><span class="hl-code"> </span><span class="hl-quotes">'</span><span class="hl-string">PDF417 Error: </span><span class="hl-quotes">'</span><span class="hl-code">.</span><span class="hl-var">$e</span><span class="hl-code">-&gt;</span><span class="hl-identifier">GetMessage</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code">;
</span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-inlinetags">?&gt;</span></pre></td></tr></table></div></div></div><p><br class="example-break">  </p><div class="figure"><a name="fig.pdf417_ex4"></a><p class="title"><b>Figure 25.13. Changing colors <code class="uri"><a class="uri" href="example_src/pdf417_ex4.html" target="_top">(<code class="filename">pdf417_ex4.php</code>)</a></code> </b></p><div class="figure-contents">  <span class="inlinemediaobject"><img src="images/pdf417_ex4.png" alt="Changing colors (pdf417_ex4.php)"></span> </div></div><p><br class="figure-break">
            </p>
        </div>
        <div class="sect2" title="Creating postscript output"><div class="titlepage"><div><div><h3 class="title"><a name="id2603338"></a>Creating postscript output</h3></div></div></div>
            
            <p>
                </p><div class="example"><a name="example.pdf417_ex5"></a><p class="title"><b>Example 25.7.  (<code class="filename">pdf417_ex5.php</code>) </b></p><div class="example-contents">  <div class="hl-main"><table class="hl-table" width="100%"><tr><td class="hl-gutter" align="right" valign="top"><pre>1
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</pre></td><td class="hl-main" valign="top"><pre><span class="hl-inlinetags">&lt;?php</span><span class="hl-code"> </span><span class="hl-comment">//</span><span class="hl-comment"> content=&quot;text/plain; charset=utf-8&quot;</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-reserved">require_once</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">jpgraph/pdf417/jpgraph_pdf417.php</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
 
</span><span class="hl-var">$data</span><span class="hl-code"> = </span><span class="hl-quotes">'</span><span class="hl-string">PDF-417</span><span class="hl-quotes">'</span><span class="hl-code">;
 
</span><span class="hl-comment">//</span><span class="hl-comment"> Setup some symbolic names for barcode specification</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-var">$columns</span><span class="hl-code"> = </span><span class="hl-number">8</span><span class="hl-code">;   </span><span class="hl-comment">//</span><span class="hl-comment"> Use 8 data (payload) columns</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$errlevel</span><span class="hl-code"> = </span><span class="hl-number">4</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Use error level 4</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$modwidth</span><span class="hl-code"> = </span><span class="hl-number">0</span><span class="hl-number">.8</span><span class="hl-code">;</span><span class="hl-comment">//</span><span class="hl-comment"> Setup module width (in PS points)</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$height</span><span class="hl-code"> = </span><span class="hl-number">3</span><span class="hl-code">;    </span><span class="hl-comment">//</span><span class="hl-comment"> Height factor (=2)</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$showtext</span><span class="hl-code"> = </span><span class="hl-reserved">true</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Show human readable string</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-reserved">try</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-comment">//</span><span class="hl-comment"> Create a new encoder and backend to generate PNG images</span><span class="hl-comment"></span><span class="hl-code">
    </span><span class="hl-var">$encoder</span><span class="hl-code"> = </span><span class="hl-reserved">new</span><span class="hl-code"> </span><span class="hl-identifier">PDF417Barcode</span><span class="hl-brackets">(</span><span class="hl-var">$columns</span><span class="hl-code">,</span><span class="hl-var">$errlevel</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code"> = </span><span class="hl-identifier">PDF417BackendFactory</span><span class="hl-code">::</span><span class="hl-identifier">Create</span><span class="hl-brackets">(</span><span class="hl-identifier">BACKEND_PS</span><span class="hl-code">,</span><span class="hl-var">$encoder</span><span class="hl-brackets">)</span><span class="hl-code">;
 
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetModuleWidth</span><span class="hl-brackets">(</span><span class="hl-var">$modwidth</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetHeight</span><span class="hl-brackets">(</span><span class="hl-var">$height</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">NoText</span><span class="hl-brackets">(</span><span class="hl-code">!</span><span class="hl-var">$showtext</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetColor</span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">black</span><span class="hl-quotes">'</span><span class="hl-code">,</span><span class="hl-quotes">'</span><span class="hl-string">yellow</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$output</span><span class="hl-code"> = </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">Stroke</span><span class="hl-brackets">(</span><span class="hl-var">$data</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-reserved">echo</span><span class="hl-code"> </span><span class="hl-identifier">nl2br</span><span class="hl-brackets">(</span><span class="hl-identifier">htmlspecialchars</span><span class="hl-brackets">(</span><span class="hl-var">$output</span><span class="hl-brackets">)</span><span class="hl-brackets">)</span><span class="hl-code">;
</span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-reserved">catch</span><span class="hl-brackets">(</span><span class="hl-identifier">JpGraphException</span><span class="hl-code"> </span><span class="hl-var">$e</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-reserved">echo</span><span class="hl-code"> </span><span class="hl-quotes">'</span><span class="hl-string">PDF417 Error: </span><span class="hl-quotes">'</span><span class="hl-code">.</span><span class="hl-var">$e</span><span class="hl-code">-&gt;</span><span class="hl-identifier">GetMessage</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code">;
</span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-inlinetags">?&gt;</span></pre></td></tr></table></div></div></div><p><br class="example-break"> 
            </p>
        </div>
        <div class="sect2" title="Manually selecting compaction schema"><div class="titlepage"><div><div><h3 class="title"><a name="id2603350"></a>Manually selecting compaction schema</h3></div></div></div>
            
            <p><span class="bold"><strong>Purpose:</strong></span></p>
            <p>To show how to manually specify the compaction schema to be used for the input
                data. The example below shows how to manually specify when to use numeric and when
                to use text mode. </p>
            <p>
                </p><div class="example"><a name="example.pdf417_ex6"></a><p class="title"><b>Example 25.8.  (<code class="filename">pdf417_ex6.php</code>) </b></p><div class="example-contents">  <div class="hl-main"><table class="hl-table" width="100%"><tr><td class="hl-gutter" align="right" valign="top"><pre>1
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</pre></td><td class="hl-main" valign="top"><pre><span class="hl-inlinetags">&lt;?php</span><span class="hl-code"> </span><span class="hl-comment">//</span><span class="hl-comment"> content=&quot;text/plain; charset=utf-8&quot;</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-reserved">require_once</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">jpgraph/pdf417/jpgraph_pdf417.php</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
 
</span><span class="hl-var">$data1</span><span class="hl-code"> = </span><span class="hl-quotes">'</span><span class="hl-string">12345</span><span class="hl-quotes">'</span><span class="hl-code">;
</span><span class="hl-var">$data2</span><span class="hl-code"> = </span><span class="hl-quotes">'</span><span class="hl-string">Abcdef</span><span class="hl-quotes">'</span><span class="hl-code">;
</span><span class="hl-var">$data3</span><span class="hl-code"> = </span><span class="hl-quotes">'</span><span class="hl-string">6789</span><span class="hl-quotes">'</span><span class="hl-code">;
 
</span><span class="hl-comment">//</span><span class="hl-comment"> Manually specify several encodation schema</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$data</span><span class="hl-code"> = </span><span class="hl-reserved">array</span><span class="hl-brackets">(</span><span class="hl-code">
    </span><span class="hl-reserved">array</span><span class="hl-brackets">(</span><span class="hl-identifier">USE_NC</span><span class="hl-code">,</span><span class="hl-var">$data1</span><span class="hl-brackets">)</span><span class="hl-code">,
    </span><span class="hl-reserved">array</span><span class="hl-brackets">(</span><span class="hl-identifier">USE_TC</span><span class="hl-code">,</span><span class="hl-var">$data2</span><span class="hl-brackets">)</span><span class="hl-code">,
    </span><span class="hl-reserved">array</span><span class="hl-brackets">(</span><span class="hl-identifier">USE_NC</span><span class="hl-code">,</span><span class="hl-var">$data3</span><span class="hl-brackets">)</span><span class="hl-brackets">)</span><span class="hl-code">;
 
</span><span class="hl-comment">//</span><span class="hl-comment">$data = &quot;12345Abcdef6789&quot;;</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-comment">//</span><span class="hl-comment"> Setup some symbolic names for barcode specification</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-var">$columns</span><span class="hl-code"> = </span><span class="hl-number">8</span><span class="hl-code">;   </span><span class="hl-comment">//</span><span class="hl-comment"> Use 8 data (payload) columns</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$modwidth</span><span class="hl-code"> = </span><span class="hl-number">2</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Use 2 pixel module width</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$errlevel</span><span class="hl-code"> = </span><span class="hl-number">2</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Use error level 2</span><span class="hl-comment"></span><span class="hl-code">
</span><span class="hl-var">$showtext</span><span class="hl-code"> = </span><span class="hl-reserved">true</span><span class="hl-code">;  </span><span class="hl-comment">//</span><span class="hl-comment"> Show human readable string</span><span class="hl-comment"></span><span class="hl-code">
 
</span><span class="hl-reserved">try</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-comment">//</span><span class="hl-comment"> Create a new encoder and backend to generate PNG images</span><span class="hl-comment"></span><span class="hl-code">
    </span><span class="hl-var">$encoder</span><span class="hl-code"> = </span><span class="hl-reserved">new</span><span class="hl-code"> </span><span class="hl-identifier">PDF417Barcode</span><span class="hl-brackets">(</span><span class="hl-var">$columns</span><span class="hl-code">,</span><span class="hl-var">$errlevel</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code"> = </span><span class="hl-identifier">PDF417BackendFactory</span><span class="hl-code">::</span><span class="hl-identifier">Create</span><span class="hl-brackets">(</span><span class="hl-identifier">BACKEND_IMAGE</span><span class="hl-code">,</span><span class="hl-var">$encoder</span><span class="hl-brackets">)</span><span class="hl-code">;
 
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">SetModuleWidth</span><span class="hl-brackets">(</span><span class="hl-var">$modwidth</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">NoText</span><span class="hl-brackets">(</span><span class="hl-code">!</span><span class="hl-var">$showtext</span><span class="hl-brackets">)</span><span class="hl-code">;
    </span><span class="hl-var">$backend</span><span class="hl-code">-&gt;</span><span class="hl-identifier">Stroke</span><span class="hl-brackets">(</span><span class="hl-var">$data</span><span class="hl-brackets">)</span><span class="hl-code">;
</span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-reserved">catch</span><span class="hl-brackets">(</span><span class="hl-identifier">JpGraphException</span><span class="hl-code"> </span><span class="hl-var">$e</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-reserved">echo</span><span class="hl-code"> </span><span class="hl-quotes">'</span><span class="hl-string">PDF417 Error: </span><span class="hl-quotes">'</span><span class="hl-code">.</span><span class="hl-var">$e</span><span class="hl-code">-&gt;</span><span class="hl-identifier">GetMessage</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code">;
</span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-inlinetags">?&gt;</span></pre></td></tr></table></div></div></div><p><br class="example-break">  </p><div class="figure"><a name="fig.pdf417_ex6"></a><p class="title"><b>Figure 25.14.  <code class="uri"><a class="uri" href="example_src/pdf417_ex6.html" target="_top">(<code class="filename">pdf417_ex6.php</code>)</a></code> </b></p><div class="figure-contents">  <span class="inlinemediaobject"><img src="images/pdf417_ex6.png" alt="(pdf417_ex6.php)"></span> </div></div><p><br class="figure-break">
            </p>
        </div>
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